OTHER FINANCIAL DATA - OTHER INCOME (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Component of Other Income, Nonoperating [Line Items]
Allowance for equity funds used during construction	$ 28		$ 14		$ 77		$ 44
Investment gains (losses)	(3)	[1]	(6)	[1]	20	[1]	16	[1]
Gains (losses) on interest rate and foreign exchange instruments, net	(6)		4		3		17
Regulatory Interest, net	2	[2]	1	[2]	5	[2]	3	[2]
Sundry, net	8		3		13		(1)
Total	29		16		118		79
San Diego Gas and Electric Company and Subsidiary [Member]
Component of Other Income, Nonoperating [Line Items]
Allowance for equity funds used during construction	8		10		26		30
Regulatory Interest, net	2	[2]	1	[2]	5	[2]	3	[2]
Sundry, net	(1)		(1)		(2)		(3)
Total	9		10		29		30
Southern California Gas Company [Member]
Component of Other Income, Nonoperating [Line Items]
Allowance for equity funds used during construction	7		4		18		14
Sundry, net	(1)		(2)		(5)		(5)
Total	$ 6		$ 2		$ 13		$ 9

[1] Represents investment (losses) gains on dedicated assets in support of our executive retirement and deferred compensation plans. These amounts are partially offset by corresponding changes in compensation expense related to the plans.

[2] Interest on regulatory balancing accounts.